text: By noon on May 20, authorities traced 79 F1s at the company involving many districts, towns and cities in the province?
classes:  No, 79 F0 cases were detected after functional forces conducted rapid tests on a large scale.  Also, 79 F0 cases were detected after functional forces conducted rapid tests on a large scale.  Yes, 79 F0 cases were detected after functional forces conducted rapid tests on a large scale.